Chances of lung cancer at 25 w/ no genetic history?

I am a 25 year old male who has smoked off and on since I was 18. I recently quit succesfully and am determined never to start again. I am confident that I will never touch another cigarette. However my roomate smokes and refuses to take it outside. I have installed a HEPA filter in my room and have informed him that I will be moving out in September because of my resolve to improve my health. What I want to know is, pending that that the last significant exposure to secondhand smoke is September and considering that I have no known genetic cancer risks, are my chances of contracting lung cancer low? I know nobody has a crystal ball, but I heard that a smoker who does not contract lung cancer for ten years after smoking has a risk factor reduced to that of a non-smoker. Please advise.

Although you have no genetic history, a history of smoking does put you at a more risk level for lung cancer. Studies have shown that second hand smoke may actually be worse than smoking. So, by already smoking in the past, you've already exposed your lungs to the carcenigens is tobacco. Continuing to expose yourself to secondhand smoke puts you at even more risk.

if people smoke around you you're a passive smoker and it's as bad as an active one. your chances are equal and growing.

Well.. give you this... Christopher Reeves wife, never smoked and she died of lung cancer. My dad smoked 2 - 3 packs a day for 45 years, worked with asbestos and he still has no lung cancer. ALTHOUGH, he has emphazema. Its terrible. He walks around with a oxygen bottle, can walk far, cant really have sex, BUT he still smokes. There are too many factors that might or might not give you lung cancer. If anything.. your best bet is to quit smoking. It really screews up your body.
It ages your skin, it stinks, it ruins your lungs, its a drug that affects your mind.. ect ect. Take care of yourself.. and quit.

congratulation for giving up, for looking after you health. I can't really answer your quit. sorry I can't help

Lung Cancer from Cigarette smoking

A recent National Cancer Institute focus group suggests that many ex-smokers believe that they are no longer at risk for lung cancer. This is a dangerous misperception. Unfortunately, some risk of lung cancer persists for many years following smoking cessation. The good news is that the risk diminishes with the passage of time.

The overwhelming majority of lung cancers, greater than 90%, are caused by cigarette smoking. There are currently almost fifty million smokers in the U.S. and another fifty million are ex-smokers.

This means that approximately one third of the population of our country is at high risk for this terrible disease and for multiple other tobacco-related diseases, including cancers of the mouth, tongue, throat, larynx, esophagus, pancreas, bladder and kidney, and also at risk for coronary artery disease, peripheral artery disease, gangrene of the legs and stroke.

it doesn't matter how long you smoked or how long you are exposed to smoke, you are at risk for lung ca at any age